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Diffstat (limited to 'src/crypto/chacha20.h')
| -rw-r--r-- | src/crypto/chacha20.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/crypto/chacha20.h b/src/crypto/chacha20.h new file mode 100644 index 0000000..e3b6b69 --- /dev/null +++ b/src/crypto/chacha20.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. + */ + +#ifndef _WG_CHACHA20_H +#define _WG_CHACHA20_H + +#include <linux/types.h> + +enum { + CHACHA20_IV_SIZE = 16, + CHACHA20_KEY_SIZE = 32, + CHACHA20_BLOCK_SIZE = 64, + HCHACHA20_KEY_SIZE = 32, + HCHACHA20_NONCE_SIZE = 16 +}; + +struct chacha20_ctx { + u32 key[8]; + u32 counter[4]; +} __aligned(32); + +void chacha20_fpu_init(void); + +static inline void chacha20_init(struct chacha20_ctx *state, const u8 key[CHACHA20_KEY_SIZE], u64 nonce) +{ + __le32 *le_key = (__le32 *)key; + state->key[0] = le32_to_cpu(le_key[0]); + state->key[1] = le32_to_cpu(le_key[1]); + state->key[2] = le32_to_cpu(le_key[2]); + state->key[3] = le32_to_cpu(le_key[3]); + state->key[4] = le32_to_cpu(le_key[4]); + state->key[5] = le32_to_cpu(le_key[5]); + state->key[6] = le32_to_cpu(le_key[6]); + state->key[7] = le32_to_cpu(le_key[7]); + state->counter[0] = state->counter[1] = 0; + state->counter[2] = nonce & U32_MAX; + state->counter[3] = nonce >> 32; +} +void chacha20(struct chacha20_ctx *state, u8 *dst, const u8 *src, u32 len, bool have_simd); + +void hchacha20(u8 derived_key[CHACHA20_KEY_SIZE], const u8 nonce[HCHACHA20_NONCE_SIZE], const u8 key[HCHACHA20_KEY_SIZE], bool have_simd); + +#endif /* _WG_CHACHA20_H */ |